CN1537921A - Method for preparing modified asphalt by using high aromatic oil - Google Patents
Method for preparing modified asphalt by using high aromatic oil Download PDFInfo
- Publication number
- CN1537921A CN1537921A CNA031095844A CN03109584A CN1537921A CN 1537921 A CN1537921 A CN 1537921A CN A031095844 A CNA031095844 A CN A031095844A CN 03109584 A CN03109584 A CN 03109584A CN 1537921 A CN1537921 A CN 1537921A
- Authority
- CN
- China
- Prior art keywords
- oil
- asphalt
- high aromatic
- aromatic oil
- sbs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 63
- 239000010692 aromatic oil Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 27
- 239000011159 matrix material Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 18
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000284 extract Substances 0.000 claims abstract description 11
- 239000001294 propane Substances 0.000 claims abstract description 6
- 230000003068 static effect Effects 0.000 claims abstract description 5
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000000605 extraction Methods 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000003209 petroleum derivative Substances 0.000 claims description 2
- 238000010008 shearing Methods 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 abstract description 4
- 239000011295 pitch Substances 0.000 description 33
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 22
- 239000002904 solvent Substances 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006277 sulfonation reaction Methods 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
The invention relates to a method for preparing modified asphalt by using high aromatic oil, which comprises the steps of mixing and stirring 10-25% (wt) of high aromatic oil, 65-85% (wt) of light deasphalted propane deoiled extract oil and 5-10% (wt) of vacuum residue oil or 10-40% (wt) of high aromatic oil, 30-45% (wt) of oxidized asphalt oil and 30-45% (wt) of vacuum residue oil by a static mixer at 100-160 ℃ for 20-80 minutes to prepare blended matrix asphalt; 92-97% (wt) of base asphalt and 3-8% (wt) of SBS are sheared at 170-240 ℃, the shearing speed is 2500-6000 rpm, the shearing time is 20-150 minutes, and the modified asphalt with better low-temperature ductility and softening point than the common asphalt is obtained.
Description
Affiliated field
The invention belongs to the production field of modifying asphalt, the present invention relates to and utilize the little mixing asphalt of high aromatic oil and penetration degree to become matrix pitch, produce modifying asphalt with this matrix pitch again, specifically, is the method for preparing modifying asphalt with high aromatic oil.
Prior art
Matrix pitch is a kind of pitch of preparing to produce with properties-correcting agent modifying asphalt, modifying asphalt is exactly the SBS modifying asphalt, and high aromatic oil is to extract out oily through the frivolous oil that subtracts four lines extraction oil, catalytic slurry extraction oil and propane deasphalting device that furfural extraction unit is handled.It is the requirement of modern road traffic to bituminous pavement that pitch is carried out modification, the highroad particularly characteristics of high-grade highway is that the volume of traffic is big, and weight-carrying capacity is big and the speed of a motor vehicle is fast, and this just proposes more and more higher requirement to pitch, general pitch is difficult to reach requirement, therefore just must carry out modification to pitch.Modifying asphalt is made up of properties-correcting agent and matrix pitch, and properties-correcting agent commonly used has SBS (styrene-butadiene-styrene thermoplastic elastomer), SBR (styrene-butadiene rubber(SBR)), PE (polyethylene) and other kind properties-correcting agent.Because SBS can improve the bituminous high temperature performance, when it joins in the pitch, can improve the pavement performance of road bitumen, and the use properties of energy road improvement pitch under high/low temperature condition, therefore SBS is rising a kind of properties-correcting agent, generally adopts SBS to produce modifying asphalt as properties-correcting agent at present both at home and abroad.
In recent years, very many to the research of SBS modifying asphalt both at home and abroad, but the patent of this respect is few, and especially Chinese patent is few.Domestic patent generally adopts solvent method to produce modifying asphalt, as what report among patent CN1048867 and the CN1069989 all is with solvent (toluene or dimethylbenzene) masterbatch to be made in the SBS dissolving earlier, allocate with a large amount of heated bitumens during on-the-spot the use, reclaim solvent again and produce modified asphalt material.Need use solvent when the shortcoming of this technology is the masterbatch manufacturing, reclaim in the product of back and still contain a small amount of solvent, and the solvent recuperation cost be higher, has increased production cost, simultaneously, these solvents are volatile, and HUMAN HEALTH and environment are worked the mischief.External research concentrates on, according to asphaltic nature, select suitable SBS to react the production modifying asphalt, just utilize SBS and bituminous sulfonation, neutral technology to develop the SBS modifying asphalt as US5393811, this technology causes the production process complexity owing to have sulfonation and N-process.
Summary of the invention
The present invention proposes with high aromatic oil as a kind of method for preparing modifying asphalt, it has improved the composition of matrix pitch, the intermiscibility of pitch and SBS is improved, production technique of the present invention is, a kind of pitch little with high aromatic oil and penetration degree reconciles into matrix pitch, add SBS again, adopt the shearing explained hereafter to go out modifying asphalt.The present invention reduces production cost owing to do not use solvent.
The object of the present invention is to provide modified asphalt preparation method, a kind of raw materials for production, as the component of blending matrix pitch, the matrix pitch of blending can directly use as heavy traffic paving asphalt.
Modified asphalt preparation method provided by the present invention, the compatibleness of increase pitch and SBS.It is dispersed in pitch mainly to solve SBS, forms stable mixed phase system, produces qualified SBS modified bitumen product.
The present invention is achieved in that
Furfural treatment with Kelamayi petro-chemical corporation (or manufacturer of other refining of petroleum) is the petroleum products furfural extract oil that process means obtains, as a kind of raw material of producing modifying asphalt.The raw material of furfural extract oil is the frivolous oil and the catalytic slurry of each section cut of comprising viscous crude decompression side line (subtract three-way, subtract four lines), propane deasphalting device, these extract the component that oil all can be used as the blending matrix pitch out, outward appearance is Vandyke brown, and character is different and different according to producing the feedstock property of extracting oil out.Specific nature is shown in Table 1.
Table 1 petro-chemical corporation furfural extract oil character
| Catalytic slurry is extracted oil out | Subtract four lines and extract oil out | The frivolous oil of propane deasphalting is extracted oil out | ||
| 20 ℃ of density, g/m 3 | ??1049 | ????992 | ????981 | |
| Open flash point, ℃ | ??252 | ????262 | ????242 | |
| 100 ℃ of viscosity, mm 2/s | ??53.25 | ????75.81 | ????83.34 | |
| Form % | Saturated part | ??12.88 | ????26.64 | ????28.44 |
| Fragrance part | ??79.45 | ????54.24 | ????54.56 | |
| Colloid | ??7.57 | ????19.12 | ????17.00 | |
| Sulphur content, % | ??0.202 | ????0.236 | ????0.182 | |
| Nitrogen content, % | ??0.37 | ????0.53 | ????0.504 | |
High aromatic oil can be concocted matrix pitch with propane deasphalting, oxidized bitumen respectively as the component of blending matrix pitch, produces the SBS modifying asphalt then.Concoct by following method.
Method with high aromatic oil and third diasphaltene blending matrix pitch.The high aromatic oil ratio is that 10～25%, the third diasphaltene ratio is 65～85%, and the vacuum residuum ratio is 5～10%.Under 100～160 ℃, through static mixer or stir 20～80min, can obtain producing the matrix pitch of modifying asphalt, it can satisfy the technical requirements of 110# or 90# heavy traffic paving asphalt.
Method with high aromatic oil and oxidized bitumen (oxidized bitumen is the pitch of 10# building asphalt or vacuum residuum direct oxidation) blending matrix pitch, the high aromatic oil ratio is 10～40%, 10# building asphalt ratio is 30～45%, and the vacuum residuum ratio is 30～45%.Under 100～160 ℃, through static mixer or stir 20～80min, can obtain matrix pitch, it can satisfy the technical requirements of 110# or 90# heavy traffic paving asphalt equally.
The method for preparing modifying asphalt with the matrix pitch of above-mentioned blending is, the matrix pitch ratio is 92～97%, and the ratio of SBS is 3～8%, at 170～240 ℃ of down cuts, velocity of shear is 2500～6000 rev/mins, and shear time is 20～150min, promptly obtains modified bitumen product.
The high aromatic oil that the present invention proposes is as the component of modifying asphalt, and the technology of blending matrix pitch is simple, can not produce the three wastes, environmentally safe, and simple with its method of producing modifying asphalt, the index of its low-temperature ductility and softening temperature is more superior than plain asphalt.
The effect of 6 inventions
Modifying asphalt component convenient sources of the present invention, refinery with furfural treatment treatment unit can the by-product high aromatic oil, respectively with third diasphaltene, half oxidized bitumen, 10# building asphalt and vacuum residuum blending matrix pitch, its mixing process is simple, adopt existing processes equipment just can finish mixing process, etching apparatus can not produce the three wastes, environmentally safe, and the matrix pitch of blending can be used as heavy traffic paving asphalt and directly uses.
From compositional analysis, good with the compatibleness of SBS, direct shear just can be produced modifying asphalt, must reclaim solvent when having overcome solvent method production modifying asphalt by the matrix pitch of high aromatic oil blending.Therefore invention has reduced production cost, and can not pollute environment owing to do not use solvent.Modifying asphalt according to the present invention's production, estimate by analysis, its low-temperature ductility (10 ℃) reaches 50cm, softening temperature reaches 60 ℃, be higher than 45 ℃ of general bituminous softening temperatures, 25 ℃ recovery of elasticity also reaches 80%, meets " polymer modified asphalt technical indicator " that the Ministry of Communications issues fully (JTJ036-1998).
Embodiment
For further specifying implementation of the present invention and characteristics, will illustrate with example.
Embodiment 1 is in having the container of agitator, take by weighing 10# building asphalt 220g, vacuum residuum 100g subtracts four lines and extracts oily 80g out, under 135 ℃, after stirring 30min, add 21g (YH801 of high mountainization) again, shear 25min, static 15min at 190 ℃, behind 190 ℃ of shearing 25min, promptly get the SBS modified bitumen product again.
All the other examples see Table 2, and modified bitumen product character sees Table 3.
Table 2 example table
| Sample | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 |
| Subtract four lines and extract oily g out | ?80 | ?100 | ?60 | ??/ | ??/ | ??/ | ?50 |
| Frivolous oil is extracted oily g out | ??/ | ???/ | ??/ | ??/ | ??80 | ??/ | ??/ |
| FCC extracts oily g out | ??/ | ???/ | ??/ | ??60 | ??/ | ??80 | ??/ |
| 10# building asphalt g | ?220 | ???/ | ?200 | ??220 | ??200 | ??/ | ??/ |
| The third diasphaltene g | ??/ | ?280 | ??/ | ???/ | ??/ | ?280 | ?320 |
| Vacuum residuum g | ?100 | ??20 | ??140 | ??120 | ??120 | ??40 | ??30 |
| Blending temperature ℃ | ?135 | ??130 | ??130 | ??130 | ??130 | ??120 | ??125 |
| Mixing time min | ?25 | ??20 | ??25 | ??25 | ??20 | ??30 | ??25 |
| SBS add-on g | ?23 | ??25 | ??20 | ??21 | ??20 | ??21 | ??24 |
| Shear temperature ℃ | ?190 | ??190 | ??190 | ??190 | ??200 | ??195 | ??220 |
| Velocity of shear rpn | ?4500 | ??5000 | ??4500 | ??4500 | ??45004 | ??4500 | ??4500 |
| Shear time min | ?50 | ??60 | ??60 | ??55 | ??55 | ??60 | ??60 |
Table 3 SBS modifying asphalt property analysis
| Sample | 25 ℃ of penetration degree 0.1mm | Softening temperature ℃ | 10 ℃ of ductility cm | Recovery of elasticity (25 ℃) % |
| Example 1 | ????66 | ????68 | ????58 | ????90 |
| Example 2 | ????61 | ????64 | ????75 | ????95 |
| Example 3 | ????86 | ????60 | ????51 | ????80 |
| Example 4 | ????68 | ????62.5 | ????51 | ????79 |
| Example 5 | ????80 | ????79 | ????95 | ????95 |
| Example 6 | ????66 | ????60.5 | ????69 | ????84 |
| Example 7 | ????65 | ????66.5 | ????90 | ????95 |
Claims (3)
1, a kind of method for preparing modifying asphalt, it is characterized in that: step 1: adopt 10～25% (wt) high aromatic oil, the frivolous oil of the propane deasphalting of 65～85% (wt) is extracted the vacuum residuum of oil and 5～10% (wt) out or is adopted 10～40% (wt) high aromatic oil, 30～45% (wt) oxidized bitumen oil and 30～45% (wt) vacuum residuum, under 100～160 ℃, through static mixer, mix and stirred 20～80 minutes, preparation blending matrix pitch; Step 2: the SBS that adopts the matrix pitch and 3～8% (wt) of 92～97% (wt), at 170～240 ℃ of down cuts, velocity of shear is 2500～6000 rev/mins, and shear time is 20～150 minutes, obtains the modifying asphalt that low-temperature ductility and softening temperature all are better than plain asphalt.
2, according to the described process for preparing modified asphalt of claim duty, it is characterized in that: the high aromatic oil that is adopted is that the employing furfural treatment is the petroleum products furfural extract oil that process means obtains.
3, like described process for preparing modified asphalt according to claim: furfural extract oil is characterized in that adopting the frivolous oil extraction oil that subtracts four lines extraction oil, catalytic slurry extraction oil or third deasphalting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109584 CN1247741C (en) | 2003-04-15 | 2003-04-15 | Method for preparing modified asphalt by using high aromatic oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109584 CN1247741C (en) | 2003-04-15 | 2003-04-15 | Method for preparing modified asphalt by using high aromatic oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1537921A true CN1537921A (en) | 2004-10-20 |
| CN1247741C CN1247741C (en) | 2006-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03109584 Expired - Fee Related CN1247741C (en) | 2003-04-15 | 2003-04-15 | Method for preparing modified asphalt by using high aromatic oil |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817985A (en) * | 2010-05-27 | 2010-09-01 | 海南高速公路股份有限公司 | Modified asphalt regeneration agent as well as preparation method and application thereof |
| CN101864182B (en) * | 2009-12-09 | 2012-01-04 | 济南开发区星火科学技术研究院 | Modified building asphalt and production method thereof |
| CN102442802A (en) * | 2011-10-10 | 2012-05-09 | 中国石油化工股份有限公司 | Colorful pavement cementing material for low-grade road surface and preparation method of colorful pavement cementing material |
| CN102702758A (en) * | 2012-06-26 | 2012-10-03 | 宁波博汇石油化工有限公司 | Process for producing asphalt modifier |
| CN101629021B (en) * | 2009-08-19 | 2012-11-28 | 西安国琳实业股份有限公司 | High-quality pavement petroleum asphalt material and preparation method thereof |
| CN103554926A (en) * | 2013-10-16 | 2014-02-05 | 中国石油化工股份有限公司 | Low-strength and high-grade road asphalt and preparation method thereof |
| CN103923474A (en) * | 2014-04-14 | 2014-07-16 | 沈阳志合科技有限公司 | Waste asphalt mixture improving agent |
| CN104073004A (en) * | 2014-06-25 | 2014-10-01 | 佛山高富中石油燃料沥青有限责任公司 | 50# asphalt and production method thereof |
| CN104194009A (en) * | 2014-08-22 | 2014-12-10 | 广饶县康斯唯绅新材料有限公司 | Preparation method of petroleum-base environment-friendly rubber plasticization functional material |
| CN109535747A (en) * | 2018-10-09 | 2019-03-29 | 中国石油化工股份有限公司 | No. 30 hard road bitumens of one kind and preparation method thereof |
| CN109608894A (en) * | 2018-12-04 | 2019-04-12 | 黄河三角洲京博化工研究院有限公司 | No. 50 A grades of bi tumenf orr oads of one kind and preparation method thereof |
| CN110484008A (en) * | 2019-08-29 | 2019-11-22 | 中海沥青股份有限公司 | A method of improving ductility after No. 50 petroleum road asphalts dry |
| CN111378465A (en) * | 2018-12-27 | 2020-07-07 | 中国石油天然气股份有限公司 | Matrix asphalt, modified asphalt and preparation method |
-
2003
- 2003-04-15 CN CN 03109584 patent/CN1247741C/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629021B (en) * | 2009-08-19 | 2012-11-28 | 西安国琳实业股份有限公司 | High-quality pavement petroleum asphalt material and preparation method thereof |
| CN101864182B (en) * | 2009-12-09 | 2012-01-04 | 济南开发区星火科学技术研究院 | Modified building asphalt and production method thereof |
| CN101817985A (en) * | 2010-05-27 | 2010-09-01 | 海南高速公路股份有限公司 | Modified asphalt regeneration agent as well as preparation method and application thereof |
| CN102442802A (en) * | 2011-10-10 | 2012-05-09 | 中国石油化工股份有限公司 | Colorful pavement cementing material for low-grade road surface and preparation method of colorful pavement cementing material |
| CN102442802B (en) * | 2011-10-10 | 2013-09-25 | 中国石油化工股份有限公司 | Colorful pavement cementing material for low-grade road surface and preparation method of colorful pavement cementing material |
| CN102702758A (en) * | 2012-06-26 | 2012-10-03 | 宁波博汇石油化工有限公司 | Process for producing asphalt modifier |
| CN103554926B (en) * | 2013-10-16 | 2016-01-27 | 中国石油化工股份有限公司 | A kind of low grade asphalt for high grade road and preparation method thereof |
| CN103554926A (en) * | 2013-10-16 | 2014-02-05 | 中国石油化工股份有限公司 | Low-strength and high-grade road asphalt and preparation method thereof |
| CN103923474A (en) * | 2014-04-14 | 2014-07-16 | 沈阳志合科技有限公司 | Waste asphalt mixture improving agent |
| CN104073004A (en) * | 2014-06-25 | 2014-10-01 | 佛山高富中石油燃料沥青有限责任公司 | 50# asphalt and production method thereof |
| CN104073004B (en) * | 2014-06-25 | 2016-01-06 | 佛山高富中石油燃料沥青有限责任公司 | A kind of No. 50 pitches and production method thereof |
| CN104194009A (en) * | 2014-08-22 | 2014-12-10 | 广饶县康斯唯绅新材料有限公司 | Preparation method of petroleum-base environment-friendly rubber plasticization functional material |
| CN109535747A (en) * | 2018-10-09 | 2019-03-29 | 中国石油化工股份有限公司 | No. 30 hard road bitumens of one kind and preparation method thereof |
| CN109535747B (en) * | 2018-10-09 | 2022-07-19 | 中国石油化工股份有限公司 | No. 30 hard road asphalt and preparation method thereof |
| CN109608894A (en) * | 2018-12-04 | 2019-04-12 | 黄河三角洲京博化工研究院有限公司 | No. 50 A grades of bi tumenf orr oads of one kind and preparation method thereof |
| CN109608894B (en) * | 2018-12-04 | 2021-04-06 | 黄河三角洲京博化工研究院有限公司 | No. 50A-grade road petroleum asphalt and preparation method thereof |
| CN111378465A (en) * | 2018-12-27 | 2020-07-07 | 中国石油天然气股份有限公司 | Matrix asphalt, modified asphalt and preparation method |
| CN111378465B (en) * | 2018-12-27 | 2022-02-01 | 中国石油天然气股份有限公司 | Matrix asphalt, modified asphalt and preparation method |
| CN110484008A (en) * | 2019-08-29 | 2019-11-22 | 中海沥青股份有限公司 | A method of improving ductility after No. 50 petroleum road asphalts dry |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1247741C (en) | 2006-03-29 |
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Effective date of registration: 20180719 Address after: 100007 Dongzhimen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNPC KARAMAY PETROCHEMICAL CO.,LTD. Patentee after: PetroChina Company Limited Address before: 100011 Beijing city Dongcheng District No. 16 Andrew intercontinental building Patentee before: PetroChina Company Limited |
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Granted publication date: 20060329 Termination date: 20210415 |